Well-casing.



A. L. COLLINS.

WELL CASING.

APPLICATION FILED OUT. 30, 1913. 1,1 12,676, Patented Oct. 6, 1914.

i I a .2 p 0 p WITNESSES: N VENTOR.

WW Mmxa X WW THE NORRIS PETERS CO PHOTO-LITHO, WASHINGTON. D. C.

ARTHUR I. COLLINS, OF SAN FRANCISCO, CALIFORNIA.

ELL-CASING.

Specification of Letters Patent.

Patented Oct. 6, 1914:.

Application filed October 30, 1913. Serial No. 798,260. 7

To all whom it may concern Be it known that I, ARTHUR I1. COLLINS, a citizen or the United States, residing at San Francisco, county 01"- San Francisco, State of California, have invented new and useful Improvements in lVell-Casings, of which the following is a specification,

An object of this invention is to be able to retard and control to a certain extent, the drifting of sand and other substances which have a tendency to flow into the center of the well with the water.

Another object of this invention is to provide a means for changing the conditions of the sand and other materials adjacent to the well casing at various times after the well is constructed.

In the accompanying drawing, the figure is a vertical section of my improved well casing.

Referring to the drawing, A. is an outer casing and is provided with a series of openings at D.

is an inner casing several inches in length. The annular space between the two casings is closed at the bottom of the inner casing at I, and open at the top 0. The bottom is a short distance below the openings D in the casing A. For the purpose of illustration E is a collar attached to casing B and seats on a ring F attached to casing A. J is a spacer to keep casing B central to casing A.

A fluid will enter the well through the holes D and then fiow in a vertical direction. This changing of the direction of the flow of the fluid will retard the movements of the particles that may be carried along with the water. Viitho'ut the inner casing the sand and other materials would be carried unimpeded to the center of the casing.

I is a spring attachment to insure the seating of the collar E and ring F.

The inner casing B may be raised so that the openings D may be exposed to the centor of the well. A water jet can be inserted at top of annular space 0 or, at holes D when inner casing is raised and materials adjacent to casing slushed out.

In the process of raising and the lowering of the tools in the well the edges N and M of casing B are subjected to shocks. The edges N and M are beveled to avoid this condition. The sleeves C and G may be attached to the outer casing A and used for the protection of inner casing B from shocks. Sleeve C will also protect annular space from objects falling from above.

I desire it to be understood that modifications of the structure as shown and described can be made without departing from the essential principles of my invention.

I claim as my'invention,

1. In combination, an outer casing, an inner casing, and means for closing at the bottom the annular space between the two casings, said annular space opening at the top of the inner casing and communicating with the interior of the well, the outer casing having a series of holes above said closed bottom and below said open top.

2. In combination, an outer casing, an inner casing, the annular space between the two casings opening at the top of the inner casing and communicating with the interior of the well, the outer casing having a series of holes above said closed bottom and below said open top, means on the outer casing for supporting the inner casing, said inner casing being movable relatively to the outer casing suiliciently to permit the holes in the outer casing to communicate below the inner casing with the central portion of the well.

3. In combination, an outer casing, an inner casing, the annular space between the two casings opening at the top of the inner casing and communicating with the interior of the well, the outer casing having aseries of holes above said closed bottom and below said open top, means for supporting the inner casing within the outer casing, said inner casing being movable relatively to the outer casing sufficiently to permit the holes in the outer casing to communicate with the central portion of the well, otherwise than over the top of the inner casing.

4. In combination, an outer casing, an inner casing, the annular space between the two casings opening at the top of the inner casing and communicating with the interior of the well, the outer casing having a series of holes above said closed bottom and below said open top, a collar at the lower end of the inner casing, and a seating ring for the collar in the outer casing, said inner casing being movable relatively to the outer casing sufficiently to permit the holes in the outer casing to communicate below the inner casing with the central portion of the well.

5. In combination, an outer casing, an inner casing, the annular space between the two casings opening at the top of the inner casing and communicating with the interior of the well the outer casing having a series of holes above said closed bottom and below said open top, a collar at the lower end of the inner casing, and a seating ring for the collar in the outer casing, said inner casing ha'ngr movable relatively to the outer casing-.1; su'l'liciently to permit the holes in the outer casing to communicate with the central portion of the well and resilient means for pressing; said ring to said collar.

(3. in comhinatiom an outer casing, an inner casing having outwardly beveled ends, and means for closing at the bottom the annular space between the two casings, said annular space opening at the top of the inner casing and communicating with the interior of the well, the outer casing having a series of holes above said. closed bottom and below said open top.

7. in combination an outer casing, an inner casing having an outwardly beveled upper end, and means for closing at the bottom the annular space between the two casings, said annular space opening at the top of the inner casing and communicating ith the interior of the well, the outer casing having a series of holes above said closed bottom and below said open top and a sleeve secured to the outer casing and extending inwardly sufiiciently :far to protect said beveled end of the inner casing.

ARTHUR L. COLLINS. Witnesses E. M. PATTEL, JAMES J. l VaLsi-x.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents,

Washington, D. O. 

